MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
mw.loader.using('mediawiki.util').then(function () {
    document.addEventListener('DOMContentLoaded', function () {
        // Select all video elements
        var videos = document.querySelectorAll('video');

        videos.forEach(function (video) {
            // Set the preload attribute to 'metadata'
            // This loads only the metadata and ensures the placeholder is displayed
            video.setAttribute('preload', 'metadata');

            // Add event listener to ensure the video plays correctly on click
            video.addEventListener('click', function () {
                video.play();
            });
        });
    });
});